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Gill carbohydrate metabolism of rainbow trout is modified during gradual adaptation to sea water
Author(s) -
Soengas J. L.,
Barciela P.,
Aldegunde M.,
Andrés D.
Publication year - 1995
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1995.tb01607.x
Subject(s) - gill , glycogenolysis , biology , glycogen , rainbow trout , pentose phosphate pathway , carbohydrate metabolism , glycolysis , metabolism , medicine , fishery , endocrinology , fish <actinopterygii>
The levels of glycogen and glucose, and the activities of several key enzymes of glycogenolysis, glycolysis and the pentose phosphate shunt were assessed in gills of rainbow trout of two sizes (97.03 ± 3.03 g and 165.69 ± 5.01 g) during gradual transfer to sea water (0, 9, 18 and 28 ppt). The results indicated changes, mainly size‐independent, in carbohydrate metabolism of gills during gradual adaptation to sea water. Glucose availability in gills increased as a result of both higher glycogenolysis and greater supply of exogeneous glucose. This glucose was mainly used for increased glycolysis, providing the ATP needed to perform the hypo‐osmoregulatory work occurring in gills during adaptation to sea water.